Compact Hard X-ray Imaging system with large FOV
Compact Hard X-ray Imaging system with large FOV
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具有大视场的紧凑型硬 X 射线成像系统
DOI：
10.1117/12.2240497
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
S. Watanabe and T. Takahashi
中科院分区：
文献类型：
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作者：
M. Katsuragawa;S. Takeda;G. Sato;A. Harayama;Patrick Kenneth Kennedy;Kieran Deasy;S. Watanabe and T. Takahashi
我们研制了一种由碲化镉双面条形探测器（CdTe-DSD）和编码掩模组成的紧凑型硬x射线成像系统。我们研究了两种不同尺寸和图案的编码掩模的成像性能。在我们的系统中，使用间距为250μm的CdTe-DSD，并将编码掩模放置在探测器上方70-100 mm处，形成紧凑的成像系统。我们从点状放射性同位素源的伽马射线线获得了高达11.8弧分的角分辨率。这与几何学的结果一致。60 keV时的能量分辨率为1.7 keV (FWHM)，成像能量范围为5 ~ 122 keV。这些结果与探测器的蒙特卡罗模拟结果非常吻合。
We have developed a compact hard X-ray imaging system composed of a cadmium telluride double-sided strip detector (CdTe-DSD) and a coded mask. We investigate the imaging performance using two different coded masks with different sizes and patterns. In our system, a CdTe-DSD of pitch 250μm is used in conjunction with a coded mask is placed 70-100 mm above the detector to form a compact imaging system. We obtained an angular resolution of up to 11.8 arc min, as measured from gamma-ray lines of point-like radioactive isotope sources. This is consistent with that expected from the geometry. The energy resolution is 1.7 keV (FWHM) at 60 keV and the energy range of imaging is from 5 keV to 122 keV. These results agree very well with Monte Carlo simulations of the detector.